Table 2.

The prediction performance of using the standard features with two novel features

	Feature set 1	Feature set 2	Feature set 3	Feature set 4
phi	22.16	21.85	22.05	21.36
psi	33.21	32.81	32.76	29.83

Note:

Feature set 1: standard features

Feature set 2: standard features plus contact number

Feature set 3: standard features plus fragsion feature

Feature set 4: standard features plus contact number and fragsion